Electric regulator.



J L. CREVELING. ELECTRIC REGULATOR.

APPLICATION FILED MAR. 16, 19104 Patented Nov. 24, 1914 i a resident of BEST AVM/iets coP.

UNITED STATES' PATENTl OFFICE.

IOHN L. CREVELING, OF NEW YORK, N. Y., ASSIGNOR TO SFETY CAR HEATING AND LIGHTING COMPANY, A CORPORATION OF NEW JERSEY.

ELECTRIC REGULATOR.

Application filed ldarch 18,1910. Serial No. 549,575.

To all whom it may concern:

Be it known that I, JOHN L. CREVELING, New York, in the county and State or' New York, have invented certain .new and usefulimprovements in Electric Regulators, as set forth in the annexed specification and draw-ing, forming apart thereo.-

Myinvention pertains to that class of devices or apparatus known as electric regulators adapted to regulate the current in an electric circuit or the voltage impressed thereupon.

My invention has for its particular object to provide an electric regulator which will automatically govern a circuit so as to produce predetermined conditionsl therein automatically, for example, to hold the voltage upon a circuit constant regardless of iiuctuations in voltage at the source of current supplying said.circuit.

The drawing is a diagrammatic representation of a translation circuit supplied from a* source of variable electro-motive force and my regulator is shown in connection with the translation circuit and so arranged as to held the voltage upon the same constant throughout the above mentioned variations in voltage upon the supply circuit In the drawing 1 represents any suitable source of current subject to variations in electro-motive force as, for example, a. storage battery which may be connected in any desired manner to a suitable charging circuit (not shown) From t-lie positive side of the storage battery the main 2 is carried to the lamps or translating devices indicated at 3 from which the main l is carried to one side of the regulator 5 from which return to the battery is made as by main Current owing from the main 4 may be considered as entering the conducting member or plate 7, mounted upon the insulating base 8, and in electrical communication with the regulating element 9, the regulating effect of which is varied by variations 1n pressure eX- erted thereupon as, for example, a pile of carbon disks or contacting electrodes. disks are held in place as by insulatingT tubes 10 carried by the rods 11 supported by the base 8. The opposite end of the upper pile of disks 9 is in contact with the conducting member 12 carried by the screw 13 threaded into the insulating bushing la carried 'by the yoke 15.- The position of the Theconducting member 12 may be governed by the screws 13 which may be locked in posi-` tion as by the nut 16. The upper and lower screws 13 are electrically connected as by means of the wire 17. It-represents a rod'of brass or other nonmagnetic material provided .with vthe adjusting nuts 19 and 20; The nut 20 has a substantially spherical portion which is in contact with the yoke 15 in the manner indicated so as to allow a slight rocking motion thereupon to equalize the pressure between the two sets of disks 9. The spring 21- surrounds the rod 18 and normally will tend to compact the disks 9 in such manner as to reduce the resistance thereof and that the voltage upon the translation circuit may be regulated by varying the pull upon the saidrod 18.

22 represents an iron frame supporting the iilsulating base 8 and the parts of the regulator attached theretoand held in any suitable. position as by bosses 23 and screws This magnetic frame 22 is provided with a. central tube of non-magnetic material indicated at .25 which holds in place the coils 26 and 9.7. The rod 18 passes through a slip lrole 28 in the base 8 and is connected witha core of ic" or other magnetic ma- Patented Nov. 24, 1914.

terial indicated at 29 which i2 provided at its opposite end with a brass rod 30 passing through the iron plug 31 which is screwlittcd into the frame 2*), and locked in a fixed position as by jam nut The rod El() passes through a slip hole 33 in the plug 91 so as to shorten the contact surface` at 2&4 and thus facilitate alinement. lf one of the coils. for instance, coil 26 be energized lines oi force will he caused to pass across the air gap 35 in a well-known manner and tend to draw the core 29 toward the plug or core 25] and thus compress the disks 9.

2%(3 is an extension of the frame 22 provided with a lever 25T made of non-magnetic material and pivotally carried by said eXtension.

3S is a rod passing through the .lever 37 and provided with the nut 39 adapted to compress the spring 40 against the lever 37 so as to press the'said lever against the end of the rod 30 and thus tend to reduceithe pressure upon the disks 9. 'The nut-41'lmts BEST AVAILABLE COP.

the travel that may be given to the rod by the spring40. The main 4 is connected with one end of the coil 26 as 'by wire 42 the other end ot' said coil being carried as by wire 43 to the resistance 44 which is connected with the main 2 as by wire 45.

46 represents a small resistance varying element as, for example, a pile of contacting electrodes such as carbon disks which are in electricalcommunication with the insulated bracket 47 and held in place as between insulating rods 48. The other end ofthe pile 46 is in contact with the conducting member or disk 49 carried by the adjustable screw 50 which is carried by the lever 51 normally drawn as by spring 52 adjustable as by screw 53 in such direction as to tend to lessen the pressure upon the pile- 46. The limit of mot-ion that can be given the leve;` 51 by thespring 52 maybe adjusted as by the screw 54. 'lhe insulated bracket 47 and screws 53 and 54 are carriedupona plate of non-magnetic material indicated at 55 which is carried unon the pole pieces of iron or .other magnetic material 56 which are united Ato the' usual core (not shown) of the electromagnet 57 as by means of screws or studs' 58.

v 59 is a stationary core of magnetic material carried by the plate 55 for the purposev of reducing the air gap between the pole pieces 56. r1`he lever 5l is supported by the pivot or shaft 60 carried by and free to revolve in the depending bracket 61. The shaft 60 has fixed thereto a spool or form of non-magnetic material 62 carrying the coil 63 also of non-magnetic material which may be in series with the winding of the electromagne't 57 and both the 'coil and the winding are connected across the translation circuit as by wires 64 and 65. It will thus be obvious that any motion given to the spool 62 will turn the shaft 60 so as to swing the lever 51 and vary the pressure upon the pile or disks 46 andI so wind the coil 63 and the electromagnet 57 that current fiowing therethrough will cause the spool 62 to tend to turn in a right-handed or clock-wise direction and thus increase the pressure open and decrease the resistance of, the pile 46 in a well-known manner. tion is well-known in the manufacture of electrical instruments, further description` of details is omitted.A The wire 66 is carried from the wire 43 to the insulated bracket 47 andthe conducting member 49 is -connected with one end of the coil 27 as by means of wire 67, the other end of said coil 27 being connected to the wire 42 as by wire 68. It will thus be obvious that the resistance 46 andthe coil 27 are in series with each other in a circuit in shunt across the coil 26 and that any current taken by this circuit will weaken the current in coil 26 andY that this weakening eiect may be increased by As this construcwinding the coil 27 in such 'manner that its magneto-motive force is opposed to that of disks 9 and main 6 back 'to the source and the voltage impressed upon the translating devices 3 will, accordingly `Jary as the pressure upon the disks 9 is varied. Current will also flow from the main2 through wire 45, resistance 44, Wire 43, coil 26 and wire 42 to the main 4. This current will cause the core 29 to be drawn toward the core 31 and I so adjust said core and nuts 19 and.

20 that the air gap 35 shall be small so as to exert a heavy pressure-,upon the disks 9.

Current will also tend t`o fiow from the Wire 43 -through the wire insulated member 47, pile 46, conducting member 49, wire 67, coil 27 and wire 68 to the wire 42', and this Vcurrent-may be governed by the resistance 46 which will be altered upon changes in pressure thereupon in a manner aswill ,hereinafter more fully be brought out. Current will also ilow from the main 2 through the wire 65, coil 63, winding of. the magnet 57 and wire 64 to the ina-'m54 and this current will be a .function of the voltage across the translating devices 3.. This current flowing through coil 63 and magnet 57 will tend-to turn thespool 62 and shaft l6() in a 'righthand direction and tend to cause the lever 51 to compress the pile 46 and reduce the resistance thereof and thus increase the current flowing therethrough, said action being opposed by the adjustable spring 52.- lf the voltage at the source be such that the voltage impressed u'pon the translating devices 3 is at, or below, the normal, it will be desired by the circuit containing the pile 46 and,-

therefore, the coil 26 will exert a heavy pull upon the disks 9 through lthe core 29, and cause said disks to-have `a -very low` resistance. Ifnow the voltage across the trans-v lating devices for any reason tends to rise, the increase in-current flowing through the coil 63 and electromagnet 57 will cause an inereasedn pressure upon the p ile 46 which will cause an increase in the current shunted away from the coil` 26 through the pile 46 and eoil27. vThe coil 27 being wound so as BEST .AVAILABLE coPA to oppose the coil 26 a slight change in the current in thiscircuit will malte a considerablechange in the resultant magneto-motive force of the coils 26 and 27 and a considerable variation in the pressure exerted uponthe disks 9. Therefore, a slight increase in voltage across the translating devices 3 will cause the resistancea to lower andthe pressure upon the disks 9'to lessen and increase the "resistance thereof so as to hold the'voltago across =the translating devices 3 substantially constant throughout wide ranges in variatin'- across the battery terminals. lf now'thevoltage shall fall 'somevvhatfthe spring 52 Willcause the resistance 46 to be increased and the pressure upon the disks 9 increased and their resistance lowered in such manner as to tend to hold the voltage across-the translating circuit constant asl may be readilyseen from theabove description. v

Having thus described my invention that which l consider as novel and desire to protect by Letters Patent is as s'et forth in the following claims: p

l. An electric regulator comprehendinga variable resistance, means for varying said 'resistance by exerting pressure thereon comprising a coiliand a movable core therefor;

together with a fixed core adjustable in, res

variable resistance, ineansyfo'r varying said resistance by exerting pressure thereon comf prising acoil and a movable core therefor; together with a iXed core so Irelated to the movable ,core as to' form an air gap, 'and means for varying the attraction betweenl saidcores` included in a circuit in shunt across said-coil. I

3. An electric regulator comprehending a variable resistance, means for varying said resistance lb y exerting pressure thereon comprising a coil and a movable core therefor;

therefor adjustable in relation to said movable core, and a second-variable resistance in circuit with the second coil and adapted to produce a variable magnetic flux uponA fecting the attraction between said members,

and means in series with one lvof said coils and in shunt to another 'for varying'said attraction. l

AAnelectric regulator embracing a Variable resistance, means resistance including a movable member of for varying said magnetic material and a fixed'member of magnetic material in adjustable relation; together' with coils for effecting the attraction between said movable and: fizle'd members; a circuit including a second variable resistance in `seriesiivitli one of. said coils and in shunt to'anotlier, and electiom'agnet Vmeans for `varying the resistance of said circuit. x f

6. An electric regulator embracing a variable resistance provided with circuit connectionsfor placing it in' the circuit to bev regulated; in combination with means for varying said resistance including a movable member o'f magnetic material'and a fixed member .of magnetic material in adjustable relation; two coilsfor affecting the magnetic flux `between said members; a circuit including a second variable resistance in series 'with one of said coils and in shunt to the saidresistance. l.

, 7.. An electric regulating device embracing a variable g resistance, electromagnetic mcansfoi" varying-said resistance by pres su re "comprising two cores and two coils, and a circuit including a secondvariable resistance' in series with one of said coils; in combination .with independent circuit conncctions .between said resistances and coils other, electromagnetic means for varyingV :and the cireuitto be controlled.

S. An electric regulating device embrac- Iing a variable resistance having circuit connections included in the circuit to be regulated, electromagnetic means, for varying said resistance by pressure, embracing two cores; one movable andtheilother fixed, and coils for producing variabile magnetic linx upon said cores; a circuit including a second resistance in series with one of said coils and in 1shunt to the other, and independent means for varying' said vsecond resistance. 9.' Means for regulating an electric'workcircuit comprising regulating lmeans responsive'to variations in" pressure and ini serted :in said circuit with the aerk to be together with a second coil and fixed core performed; means for creating pressure on the regulating means including a coil connected across the Work-circuit; a second coil in shunt around the/first coil; a second regulating means' responsive' to variations in pressureffin series with the second-named coil; and means for creating pressure upon the second-named regulatingmeans connectl ed across thcjvorlr-circuit.

10. Means "for reO'ul ating an'. electric -circuit comprising a resistance variable in proportion, to the pressure imposed. thereon; means-for variably imposing such pressure upon said resistance, includinga coil and a core operated thereby; a second coil Wound to oppose the action of the first-named coil and connected in shunt around the latter; a second pressure responsive means in series with the .second-named coil; and electro- BEST AVAILABLE oop.

magnetic means for imposing pressure upon the second pressure,responsive means.

11. An electric regulator for regulating an electric circuit eoinprising'a resistance variable in accordance with the pressure imposed thereon; two separated cores arranged in alnement therewith7 and two coils surrounding the saine and wound to oppose each other for \'arying the pressure upon said resistance; means operatively connecting the cores to the resistance; interconneeted circuits for the two coils, so arranged that one of the coils is connected in shunt to the resistance and the other coil is oonnected in shun-t to the first-named coil; and 15 a second resistance variable according to the pressure imposed thereon arranged in one of the coil circuits so as to vary the action Aof both coils; `and current-controlled means for Varying the pressure imposed 20 upon said second resistance.

JOHN L. CREVELING.

'Vitnesses E. HALL,

M. Hnnsxovrrz 

